Dorman Products (DORM) 10-K 23 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 26, 2015	Feb. 19, 2016	Jun. 27, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 26, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	DORM
Entity Registrant Name	Dorman Products, Inc.
Entity Central Index Key	868,780
Current Fiscal Year End Date	--12-26
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,779,320
Entity Public Float			$ 1,349,904,425

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Income Statement [Abstract]
Net sales	$ 802,957	$ 751,476	$ 664,466
Cost of goods sold	494,907	464,275	403,498
Gross profit	308,050	287,201	260,968
Selling, general and administrative expenses	161,893	146,467	133,029
Income from operations	146,157	140,734	127,939
Interest expense, net	216	204	189
Income before income taxes	145,941	140,530	127,750
Provision for income taxes	53,612	50,543	45,830
Net income	$ 92,329	$ 89,987	$ 81,920
Earnings per share:
Basic	$ 2.60	$ 2.50	$ 2.25
Diluted	$ 2.60	$ 2.49	$ 2.24
Weighted average shares outstanding:
Basic	35,466	36,052	36,347
Diluted	35,538	36,190	36,624

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 78,659	$ 47,656
Accounts receivable, less allowance for doubtful accounts and customer credits of $86,986 and $79,179 in 2015 and 2014, respectively	203,923	206,035
Inventories	193,725	173,523
Prepaids and other current assets	2,326	3,147
Total current assets	478,633	430,361
Property, plant and equipment, net	87,046	82,270
Goodwill and intangible assets, net	29,889	29,989
Deferred tax asset, net	7,557	2,451
Other assets	18,740	12,645
Total	621,865	557,716
Current liabilities:
Accounts payable	63,967	59,541
Accrued compensation	10,970	10,713
Other accrued liabilities	23,633	20,579
Total current liabilities	98,570	90,833
Other long-term liabilities	$ 5,259	$ 4,822
Commitments and contingencies (Note 10)
Shareholders' equity:
Common stock, par value $0.01; authorized 50,000,000 shares; issued and outstanding 34,863,396 and 35,611,238 shares in 2015 and 2014, respectively	$ 349	$ 356
Additional paid-in capital	42,799	43,413
Retained earnings	474,888	418,292
Total shareholders' equity	518,036	462,061
Total	$ 621,865	$ 557,716

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts and customer credits	$ 86,986	$ 79,179
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	34,863,396	35,611,238
Common stock, shares outstanding	34,863,396	35,611,238

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 29, 2012	$ 332,872	$ 365	$ 41,007	$ 291,500
Beginning Balance, Shares at Dec. 29, 2012		36,477,506
Exercise of stock options	551	$ 1	550
Exercise of stock options, shares		93,509
Compensation expense under Incentive Stock Plan	960		960
Purchase and cancellation of common stock	$ (3,489)	$ (1)	(142)	(3,346)
Purchase and cancellation of common stock, Shares	(78,580)	(78,580)
Issuance of non-vested stock, net of cancellations	$ 0	$ 0	0	0
Issuance of non-vested stock, net of cancellations, Shares		(17,626)
Other stock related activity, net of tax	827		744	83
Other stock related activity, net of tax, Shares		(9,851)
Net income	81,920			81,920
Ending Balance at Dec. 28, 2013	413,641	$ 365	43,119	370,157
Ending Balance, Shares at Dec. 28, 2013		36,464,958
Exercise of stock options	463	$ 1	462
Exercise of stock options, shares		66,500
Compensation expense under Incentive Stock Plan	1,146		1,146
Purchase and cancellation of common stock	$ (43,519)	$ (9)	(1,651)	(41,859)
Purchase and cancellation of common stock, Shares	(61,830)	(917,430)
Issuance of non-vested stock, net of cancellations	$ 0	$ 0	0	0
Issuance of non-vested stock, net of cancellations, Shares		5,060
Other stock related activity, net of tax	343	$ (1)	337	7
Other stock related activity, net of tax, Shares		(7,850)
Net income	89,987			89,987
Ending Balance at Dec. 27, 2014	$ 462,061	$ 356	43,413	418,292
Ending Balance, Shares at Dec. 27, 2014	35,611,238	35,611,238
Exercise of stock options	$ 93		93
Exercise of stock options, shares		31,305
Compensation expense under Incentive Stock Plan	882		882
Purchase and cancellation of common stock	$ (37,324)	$ (7)	(1,406)	(35,911)
Purchase and cancellation of common stock, Shares	(33,430)	(781,130)
Issuance of non-vested stock, net of cancellations	$ 0	$ 0	0	0
Issuance of non-vested stock, net of cancellations, Shares		8,922
Other stock related activity, net of tax	(5)		(183)	178
Other stock related activity, net of tax, Shares		(6,939)
Net income	92,329			92,329
Ending Balance at Dec. 26, 2015	$ 518,036	$ 349	$ 42,799	$ 474,888
Ending Balance, Shares at Dec. 26, 2015	34,863,396	34,863,396

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Cash Flows from Operating Activities:
Net income	$ 92,329	$ 89,987	$ 81,920
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	16,186	12,658	10,159
Provision for doubtful accounts	3,260	308	194
(Benefit) provision for deferred income tax	(5,106)	(632)	267
Provision for non-cash stock compensation	882	1,146	960
Changes in assets and liabilities:
Accounts receivable	(1,148)	(25,566)	(40,791)
Inventories	(20,202)	(13,136)	(18,537)
Prepaids and other current assets	821	(522)	840
Other assets	(3,962)	(6,757)	(884)
Accounts payable	5,389	(1,558)	17,627
Accrued compensation and other liabilities	3,611	3,712	9,804
Cash provided by operating activities	92,060	59,640	61,559
Cash Flows from Investing Activities:
Property, plant and equipment additions	(21,688)	(29,862)	(24,666)
Acquisition			(1,897)
Purchase of equity investment	(2,133)
Cash used in investing activities	(23,821)	(29,862)	(26,563)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	93	463	551
Other stock related activity	(5)	343	827
Purchase and cancellation of common stock	(37,324)	(43,521)	(3,489)
Cash used in financing activities	(37,236)	(42,715)	(2,111)
Net Increase (Decrease) in Cash and Cash Equivalents	31,003	(12,937)	32,885
Cash and Cash Equivalents, Beginning of Period	47,656	60,593	27,708
Cash and Cash Equivalents, End of Period	78,659	47,656	60,593
Supplemental Cash Flow Information
Cash paid for interest expense	281	234	201
Cash paid for income taxes	$ 57,151	$ 46,540	$ 44,291

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 26, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Dorman Products, Inc. (“Dorman”, the “Company”, “we”, “us”, or “our”) is a leading supplier of Original Equipment (“OE”) Dealer “Exclusive” automotive replacement parts, automotive hardware, brake products and household hardware to the Automotive Aftermarket and Mass Merchandise markets. Dorman parts are marketed under the OE Solutions™, HELP! ® ® We operate on a fifty-two, fifty-three week period ending on the last Saturday of the calendar year. The fiscal years ended December 26, 2015, December 27, 2014 and December 28, 2013 were fifty-two week periods. Principles of Consolidation Use of Estimates in the Preparation of Financial Statements Reclassifications. Cash and Cash Equivalents Sales of Accounts Receivable Inventories Property and Depreciation Estimated useful lives by major asset category are as follows: Buildings and building improvements 10 to 39 years Machinery, equipment and tooling 3 to 10 years Software and computer equipment 3 to 10 years Furniture, fixtures and leasehold improvements 3 to 15 years Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. The impairment review is a two-step process. First, recoverability is measured by comparing the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount exceeds the estimated undiscounted future cash flows, the second step of the impairment test is performed and an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds its fair value. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposal group classified as held for sale would be presented separately in the appropriate asset and liability sections of the balance sheet. Goodwill Other Assets Long-term core inventory of $14.6 million and $10.2 million as of December 26, 2015 and December 27, 2014, respectively, represents products used in remanufacturing processes, and consists of used cores purchased and held in our facilities, used cores that are in the process of being returned from our customers and end-users, and remanufactured cores held in finished goods inventory at our facilities. A used core is reconditioned and sold to the customer as a replacement for a unit inside a vehicle. Our products that utilize a core primarily include instrument clusters and hybrid batteries. Customers and end-users that purchase remanufactured products will generally return the used core to us, which we then use in the remanufacturing process to make another finished good. Long-term core inventory is recorded at the lower of cost or market value. Cost is determined based on actual purchases of core inventory. We believe that the most appropriate classification of core inventory is a long-term asset. According to guidance provided under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), current assets are defined as “assets or resources commonly identified as those which are reasonably expected to be realized in cash or sold or consumed during the normal operating cycle of the business.” The determination of the long-term classification is based on our view that the value of the cores is not consumed or realized in cash during our normal operating cycle. Other Accrued Liabilities. Revenue Recognition and Allowance for Customer Credits Research and Development Stock-Based Compensation Income Taxes assets or liabilities at the end of each period are determined using the tax rate expected to be in effect when taxes are actually paid or recovered. Unrecognized income tax benefits represent income tax positions taken on income tax returns that have not been recognized in the consolidated financial statements. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Additionally, we accrue interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws. Interest and penalties are classified as income tax expense in the Consolidated Statements of Operations. The Company does not anticipate significant changes in the amount of unrecognized income tax benefits over the next year. Concentrations of Risk Fair Value Disclosures

New and Recently Adopted Accoun

New and Recently Adopted Accounting Pronouncements	12 Months Ended
	Dec. 26, 2015
Accounting Changes and Error Corrections [Abstract]
New and Recently Adopted Accounting Pronouncements	2. New and Recently Adopted Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall

Acquisition

Acquisition	12 Months Ended
	Dec. 26, 2015
Business Combinations [Abstract]
Acquisition	3. Acquisition On May 17, 2013, we acquired certain assets and assumed certain liabilities of Re-Involt Technologies, LLC, a remanufacturer of hybrid battery systems, primarily to expand our product portfolio. The purchase price was approximately $3.7 million, comprised of $1.9 million in cash and $1.8 million of estimated contingent payments to the former owner. The contingent payment arrangement is based upon future earnings levels of the acquired business. In December 2014, we reduced our liability for the contingent payment arrangement by $1.0 million based upon our estimates of future earnings. In connection with this acquisition, we recorded $3.6 million in goodwill and other intangible assets, all of which we expect to be deductible for tax purposes. The financial results of the acquired business have been included in the Consolidated Financial Statements since the acquisition date.

Inventories

Inventories	12 Months Ended
	Dec. 26, 2015
Inventory Disclosure [Abstract]
Inventories	4. Inventories Inventories include the cost of material, freight, direct labor and overhead utilized in the processing of our products. Inventories were as follows: (in thousands) December 26, December 27, Bulk product $ 78,533 $ 65,603 Finished product 112,012 105,117 Packaging materials 3,180 2,803 Total $ 193,725 $ 173,523

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 26, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	5. Property, Plant and Equipment Property, plant and equipment include the following: (in thousands) December 26, December 27, Buildings $ 29,056 $ 29,185 Machinery, equipment and tooling 76,991 66,441 Furniture, fixtures and leasehold improvements 4,015 3,974 Software and computer equipment 69,607 65,525 Total 179,669 165,125 Less-accumulated depreciation and amortization (92,623 ) (82,855 ) Property, plant and equipment, net $ 87,046 $ 82,270

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 26, 2015
Debt Disclosure [Abstract]
Long-Term Debt	6. Long-Term Debt We have a $30.0 million revolving credit facility which expires in June 2017. Borrowings under the facility are on an unsecured basis with interest rates ranging from LIBOR plus 65 basis points to LIBOR plus 250 basis points based upon the achievement of certain benchmarks related to the ratio of funded debt to EBITDA, as defined by our credit agreement. The interest rate at December 26, 2015 was LIBOR plus 65 basis points (1.07%). There were no borrowings under the facility as of December 26, 2015. As of December 26, 2015, we had two outstanding letters of credit for approximately $1.0 million in the aggregate which were issued to secure ordinary course of business transactions. Net of these letters of credit, we had approximately $29.0 million available under the facility at December 26, 2015. The credit agreement also contains covenants, the most restrictive of which pertain to net worth and the ratio of debt to EBITDA. As of December 26, 2015, we were in compliance with all financial covenants contained in the revolving credit facility.

Operating Lease Commitments and

Operating Lease Commitments and Rent Expense	12 Months Ended
	Dec. 26, 2015
Leases [Abstract]
Operating Lease Commitments and Rent Expense	7. Operating Lease Commitments and Rent Expense We lease certain equipment and operating facilities, including our primary operating facility which is leased from a partnership described in Note 8, Related Party Transactions, under non-cancelable operating leases. Approximate future minimum rental payments as of December 26, 2015 under these leases are summarized as follows: (in thousands) 2016 $ 3,967 2017 3,902 2018 1,973 2019 72 2020 — Thereafter — Total $ 9,914 Rent expense, including payments for short-term equipment and storage rentals, was $4.5 million in fiscal 2015, $4.1 million in fiscal 2014 and $3.7 million in fiscal 2013.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 26, 2015
Related Party Transactions [Abstract]
Related Party Transactions	8. Related Party Transactions We have a non-cancelable operating lease for our primary operating facility from a partnership in which Steven L. Berman, our Executive Chairman, and his family members are partners. Total rental payments each year to the partnership under the lease arrangement were $1.6 million in fiscal 2015 and $1.5 million in fiscal 2014 and fiscal 2013. In the opinion of our Audit Committee, the terms and rates of this lease were no less favorable than those which could have been obtained from an unaffiliated party when the lease was renewed in fiscal 2012. The lease will expire on December 31, 2017. We are a partner in a joint venture with one of our suppliers and own a minority interest in another supplier. Purchases from these suppliers were $9.9 million, $9.3 million and $5.6 million in fiscal 2015, fiscal 2014 and fiscal 2013, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 26, 2015
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The components of the income tax provision (benefit) are as follows: (in thousands) 2015 2014 2013 Current: Federal $ 55,140 $ 48,293 $ 42,458 State 3,578 2,882 3,105 58,718 51,175 45,563 Deferred: Federal (4,874 ) (597 ) 249 State (232 ) (35 ) 18 (5,106 ) (632 ) 267 Total $ 53,612 $ 50,543 $ 45,830 The following is a reconciliation of income taxes at the statutory tax rate to the Company’s effective tax rate: 2015 2014 2013 Federal taxes at statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal tax benefit 1.8 1.2 1.6 Research and development tax credit (0.2 ) (0.4 ) (0.7 ) Other 0.1 0.2 — Effective tax rate 36.7 % 36.0 % 35.9 % At December 26, 2015, we had $1.9 million of unrecognized tax benefits, $1.3 million of which would affect our effective tax rate if recognized. The following table summarizes the change in uncertain tax benefits for the three years ended December 26, 2015: (in thousands) 2015 2014 2013 Balance at beginning of year $ 1,163 $ 1,201 $ 1,785 Reductions due to lapses in statutes of limitations — (301 ) (30 ) Reductions due to tax positions settled (177 ) — (271 ) Reductions due to reversals of prior year positions (20 ) (38 ) (736 ) Additions based on tax positions taken during the current period 889 301 453 Balance at end of year $ 1,855 $ 1,163 $ 1,201 We recognize interest and penalties related to uncertain tax positions in income tax expense. As of December 26, 2015, we had approximately $0.2 million of accrued interest related to uncertain tax positions. Deferred income taxes result from timing differences in the recognition of revenue and expense for tax and financial statement purposes. The sources of temporary differences are as follows: (in thousands) December 26, December 27, Assets: Inventories $ 8,685 $ 7,989 Accounts receivable 18,954 15,652 Accrued expenses 2,435 1,780 Other 214 197 Gross deferred tax assets 30,288 25,618 Liabilities: Depreciation 13,207 13,406 Goodwill and intangible assets 9,524 9,761 Gross deferred tax liabilities 22,731 23,167 Net deferred tax assets $ 7,557 $ 2,451 Based on our history of taxable income and our projection of future earnings, we believe that it is more likely than not that sufficient taxable income will be generated in the foreseeable future to realize the remaining net deferred tax assets. We file income tax returns in the United States, China and Mexico. All years before 2012 are closed for federal tax purposes. The examination by the Internal Revenue Service for the 2011 and 2012 tax years resulted in de minimis adjustments. We are currently under examination by one state tax authority for years 2009-2012. Tax years before 2011 are closed for the remaining states in which we file. We filed tax returns in Sweden through 2012 and all years prior to 2009 are closed. It is reasonably possible that audit settlements, the conclusion of current examinations or the expiration of the statute of limitations could impact the Company’s unrecognized tax benefits.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 26, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies Shareholders’ Agreement Legal Proceedings

Capital Stock

Capital Stock	12 Months Ended
	Dec. 26, 2015
Equity [Abstract]
Capital Stock	11. Capital Stock Controlling Interest by Officers, Directors and Family Members Undesignated Stock Incentive Stock Plan We grant restricted stock to certain employees and members of our Board of Directors. The value of restricted stock issued is based on the fair value of our common stock on the grant date. Vesting of restricted stock is based on continued employment or service for a specified period and, in certain circumstances, the attainment of financial goals. Compensation cost related to the stock is recognized on a straight-line basis over the vesting period. We retain the restricted stock, and any dividends paid thereon, until the vesting provisions have been met. Compensation cost related to restricted stock was $0.9 million, $1.1 million and $0.8 million in fiscal 2015, fiscal 2014 and fiscal 2013, respectively. The compensation costs were classified as selling, general and administrative expense in the Consolidated Statements of Operations. No cost was capitalized during fiscal 2015, fiscal 2014 or fiscal 2013. The following table summarizes our restricted stock activity for the three years ended December 26, 2015: Shares Weighted Balance at December 29, 2012 174,154 $ 18.02 Granted 25,500 $ 45.06 Vested (47,069 ) $ 17.38 Cancelled (43,126 ) $ 18.28 Balance at December 28, 2013 109,459 $ 24.47 Granted 26,347 $ 51.41 Vested (41,619 ) $ 23.44 Cancelled (21,287 ) $ 48.29 Balance at December 27, 2014 72,900 $ 27.82 Granted 44,104 $ 45.68 Vested (38,580 ) $ 25.24 Cancelled (35,182 ) $ 44.84 Balance at December 26, 2015 43,242 $ 34.49 As of December 26, 2015, there was approximately $1.0 million of unrecognized compensation cost related to nonvested restricted stock, which is expected to be recognized over a weighted-average period of approximately 2.9 years. Cash flows resulting from tax deductions in excess of the tax effect of compensation cost recognized in the financial statements are classified as financing activities. The excess tax benefit generated from vested restricted shares was $0.3 million, $0.5 million, and $0.3 million in fiscal 2015, fiscal 2014, and fiscal 2013, respectively, and was credited to additional paid in capital. We grant stock options to certain employees and members of our Board of Directors. We expense the grant-date fair value of stock options. Compensation cost is recognized on a straight-line basis over the vesting period, during which related services are performed. Compensation cost charged against income was less than $0.1 million in each of fiscal 2015, fiscal 2014 and fiscal 2013, respectively. The compensation costs were classified as selling, general and administrative expense in the Consolidated Statements of Operations. No cost was capitalized during fiscal 2015, fiscal 2014 or fiscal 2013. No stock options were granted in fiscal 2015, fiscal 2014 or fiscal 2013. Historically, we have used the Black-Scholes option valuation model to estimate the fair value of stock options granted. Expected volatility and expected dividend yield are based on the actual historical experience of our common stock. The expected life represents the period of time that options granted are expected to be outstanding and was calculated using historical option exercise data. The risk-free rate is based on the U.S. Treasury security with terms equal to the expected time of exercise as of the grant date. We included a forfeiture assumption of 5.4% in the calculation of expense in fiscal 2015, fiscal 2014 and fiscal 2013. The following table summarizes our stock option activity for the three years ended December 26, 2015: Shares Option Price Weighted Weighted Aggregate Balance at December 29, 2012 274,000 $ 2.54 – $22.71 $ 8.62 Exercised (96,500 ) $ 2.54 – $22.71 $ 7.21 Cancelled (36,000 ) $ 7.74 – $22.71 $ 16.98 Balance at December 28, 2013 141,500 $ 5.05 – $19.37 $ 7.13 Exercised (66,500 ) $ 5.67 – $19.37 $ 6.97 Balance at December 27, 2014 75,000 $ 5.05 – $19.37 $ 7.28 Exercised (35,000 ) $ 5.05 – $19.37 $ 7.76 Balance at December 26, 2015 40,000 $ 5.67 – $7.74 $ 6.86 2.3 $ 1,688,920 Options exercisable at December 26, 2015 40,000 $ 5.67 – $7.74 $ 6.86 2.3 $ 1,688,920 The total intrinsic value of stock options exercised during fiscal 2015 was $1.4 million. As of December 26, 2015, there was no unrecognized compensation cost related to non-vested stock options. The following table summarizes information concerning currently outstanding and exercisable options at December 26, 2015: Options Outstanding Options Exercisable Range of Exercise Price Number Weighted Weighted Number Weighted $5.67 4,000 3.0 $ 5.67 4,000 $ 5.67 $6.90 32,000 2.0 $ 6.90 32,000 $ 6.90 $7.74 4,000 4.0 $ 7.74 4,000 $ 7.74 Balance at December 26, 2015 40,000 2.3 $ 6.86 40,000 $ 6.86 Cash received from option exercises was $0.1 million, $0.5 million, and $0.6 million during fiscal 2015, fiscal 2014, and fiscal 2013, respectively. The excess tax benefit generated from option exercises was $0.1 million, $0.3 million and $0.8 million during fiscal 2015, fiscal 2014 and fiscal 2013, respectively, and was credited to additional paid in capital. Performance-Based Long Term Award Program. 401(k) Retirement Plan Common Stock Repurchases. Share Repurchase Program

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 26, 2015
Earnings Per Share [Abstract]
Earnings Per Share	12. Earnings Per Share Basic earnings per share was calculated by dividing our net income by the weighted average number of common shares outstanding during the period, excluding nonvested restricted stock which is considered to be contingently issuable. To calculate diluted earnings per share, common share equivalents are added to the weighted average number of common shares outstanding. Common share equivalents are calculated using the treasury stock method and are computed based on outstanding stock-based awards. Stock-based awards of 7,500 shares and 5,000 shares were excluded from the calculation of diluted earnings per share as of December 26, 2015 and December 27, 2014, respectively, as their effect would have been anti-dilutive. No stock-based awards were considered anti-dilutive in the fiscal year ended December 28, 2013. The following table sets forth the computation of basic earnings per share and diluted earnings per share: (in thousands, except per share data) 2015 2014 2013 Numerator: Net income $ 92,329 $ 89,987 $ 81,920 Denominator: Weighted average basic shares outstanding 35,466 36,052 36,347 Effect of compensation awards 72 138 277 Weighted average diluted shares outstanding 35,538 36,190 36,624 Earnings Per Share: Basic $ 2.60 $ 2.50 $ 2.25 Diluted $ 2.60 $ 2.49 $ 2.24

Business Segments

Business Segments	12 Months Ended
	Dec. 26, 2015
Segment Reporting [Abstract]
Business Segments	13. Business Segments We have determined that our business comprises a single reportable operating segment, namely, the sale of replacement parts for the automotive aftermarket. During fiscal 2015, fiscal 2014 and fiscal 2013, four of our customers (Advance Auto Parts, AutoZone, Genuine Parts Co. – NAPA and O’Reilly Auto Parts) each accounted for more than 10% of net sales and in the aggregate accounted for 60% of net sales in each of fiscal 2015 and fiscal 2014 and 57% of net sales in fiscal 2013. Net sales to countries outside the United States, primarily to Europe, Mexico, the Middle East, Asia and Canada in fiscal 2015, fiscal 2014 and fiscal 2013 were $49.8 million, $39.1 million and $33.2 million, respectively.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 26, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	14. Quarterly Results of Operations (Unaudited) The following is a summary of the unaudited quarterly Results of Operations for the fiscal years ended December 26, 2015 and December 27, 2014: (in thousands, except per share amounts) First Second Third Fourth 2015 Net sales $ 188,474 $ 198,721 $ 210,928 $ 204,834 Income from operations 33,652 36,895 41,240 34,370 Net income 21,339 23,143 26,060 21,787 Diluted earnings per share 0.60 0.65 0.73 0.62 (in thousands, except per share amounts) First Second Third Fourth 2014 Net sales $ 183,512 $ 196,187 $ 197,796 $ 173,981 Income from operations 36,947 36,700 38,476 28,611 Net income 23,551 23,244 24,536 18,656 Diluted earnings per share 0.64 0.64 0.68 0.52

Schedule II_ Valuation and Qual

Schedule II: Valuation and Qualifying Accounts	12 Months Ended
	Dec. 26, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule II: Valuation and Qualifying Accounts	SCHEDULE II: Valuation and Qualifying Accounts (in thousands) For the Year Ended December 26, December 27, December 28, Allowance for doubtful accounts: Balance, beginning of period $ 1,508 $ 1,281 $ 1,120 Provision 3,260 308 194 Charge-offs (265 ) (81 ) (33 ) Balance, end of period $ 4,503 $ 1,508 $ 1,281 Allowance for customer credits: Balance, beginning of period $ 77,671 $ 64,598 $ 55,392 Provision 206,560 182,219 141,559 Credits issued (201,748 ) (169,146 ) (132,353 ) Balance, end of period $ 82,483 $ 77,671 $ 64,598

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 26, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements
Reclassifications	Reclassifications.
Cash and Cash Equivalents	Cash and Cash Equivalents
Sales of Accounts Receivable	Sales of Accounts Receivable
Inventories	Inventories
Property and Depreciation	Property and Depreciation Estimated useful lives by major asset category are as follows: Buildings and building improvements 10 to 39 years Machinery, equipment and tooling 3 to 10 years Software and computer equipment 3 to 10 years Furniture, fixtures and leasehold improvements 3 to 15 years Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. The impairment review is a two-step process. First, recoverability is measured by comparing the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount exceeds the estimated undiscounted future cash flows, the second step of the impairment test is performed and an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds its fair value. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposal group classified as held for sale would be presented separately in the appropriate asset and liability sections of the balance sheet.
Goodwill	Goodwill
Other Assets	Other Assets Long-term core inventory of $14.6 million and $10.2 million as of December 26, 2015 and December 27, 2014, respectively, represents products used in remanufacturing processes, and consists of used cores purchased and held in our facilities, used cores that are in the process of being returned from our customers and end-users, and remanufactured cores held in finished goods inventory at our facilities. A used core is reconditioned and sold to the customer as a replacement for a unit inside a vehicle. Our products that utilize a core primarily include instrument clusters and hybrid batteries. Customers and end-users that purchase remanufactured products will generally return the used core to us, which we then use in the remanufacturing process to make another finished good. Long-term core inventory is recorded at the lower of cost or market value. Cost is determined based on actual purchases of core inventory. We believe that the most appropriate classification of core inventory is a long-term asset. According to guidance provided under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), current assets are defined as “assets or resources commonly identified as those which are reasonably expected to be realized in cash or sold or consumed during the normal operating cycle of the business.” The determination of the long-term classification is based on our view that the value of the cores is not consumed or realized in cash during our normal operating cycle.
Other Accrued Liabilities	Other Accrued Liabilities.
Revenue Recognition and Allowance for Customer Credits	Revenue Recognition and Allowance for Customer Credits
Research and Development	Research and Development
Stock-Based Compensation	Stock-Based Compensation
Income Taxes	Income Taxes assets or liabilities at the end of each period are determined using the tax rate expected to be in effect when taxes are actually paid or recovered. Unrecognized income tax benefits represent income tax positions taken on income tax returns that have not been recognized in the consolidated financial statements. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Additionally, we accrue interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws. Interest and penalties are classified as income tax expense in the Consolidated Statements of Operations. The Company does not anticipate significant changes in the amount of unrecognized income tax benefits over the next year.
Concentrations of Risk	Concentrations of Risk
Fair Value Disclosures	Fair Value Disclosures
New and Recently Adopted Accounting Pronouncements	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory

Summary of Significant Accoun23

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 26, 2015
Accounting Policies [Abstract]
Estimated Useful Lives by Major Asset	Estimated useful lives by major asset category are as follows: Buildings and building improvements 10 to 39 years Machinery, equipment and tooling 3 to 10 years Software and computer equipment 3 to 10 years Furniture, fixtures and leasehold improvements 3 to 15 years

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 26, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories include the cost of material, freight, direct labor and overhead utilized in the processing of our products. Inventories were as follows: (in thousands) December 26, December 27, Bulk product $ 78,533 $ 65,603 Finished product 112,012 105,117 Packaging materials 3,180 2,803 Total $ 193,725 $ 173,523

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 26, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment include the following: (in thousands) December 26, December 27, Buildings $ 29,056 $ 29,185 Machinery, equipment and tooling 76,991 66,441 Furniture, fixtures and leasehold improvements 4,015 3,974 Software and computer equipment 69,607 65,525 Total 179,669 165,125 Less-accumulated depreciation and amortization (92,623 ) (82,855 ) Property, plant and equipment, net $ 87,046 $ 82,270

Operating Lease Commitments a26

Operating Lease Commitments and Rent Expense (Tables)	12 Months Ended
	Dec. 26, 2015
Leases [Abstract]
Summary of Future Minimum Rental Payments under Leases	Approximate future minimum rental payments as of December 26, 2015 under these leases are summarized as follows: (in thousands) 2016 $ 3,967 2017 3,902 2018 1,973 2019 72 2020 — Thereafter — Total $ 9,914

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 26, 2015
Income Tax Disclosure [Abstract]
Components of Income Tax Provision (Benefit)	The components of the income tax provision (benefit) are as follows: (in thousands) 2015 2014 2013 Current: Federal $ 55,140 $ 48,293 $ 42,458 State 3,578 2,882 3,105 58,718 51,175 45,563 Deferred: Federal (4,874 ) (597 ) 249 State (232 ) (35 ) 18 (5,106 ) (632 ) 267 Total $ 53,612 $ 50,543 $ 45,830
Reconciliation of Income Taxes at Statutory Tax Rate to Company's Effective Tax Rate	The following is a reconciliation of income taxes at the statutory tax rate to the Company’s effective tax rate: 2015 2014 2013 Federal taxes at statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal tax benefit 1.8 1.2 1.6 Research and development tax credit (0.2 ) (0.4 ) (0.7 ) Other 0.1 0.2 — Effective tax rate 36.7 % 36.0 % 35.9 %
Change in Uncertain Tax Benefits	The following table summarizes the change in uncertain tax benefits for the three years ended December 26, 2015: (in thousands) 2015 2014 2013 Balance at beginning of year $ 1,163 $ 1,201 $ 1,785 Reductions due to lapses in statutes of limitations — (301 ) (30 ) Reductions due to tax positions settled (177 ) — (271 ) Reductions due to reversals of prior year positions (20 ) (38 ) (736 ) Additions based on tax positions taken during the current period 889 301 453 Balance at end of year $ 1,855 $ 1,163 $ 1,201
Reconciliation of Deferred Tax Assets and Liabilities	Deferred income taxes result from timing differences in the recognition of revenue and expense for tax and financial statement purposes. The sources of temporary differences are as follows: (in thousands) December 26, December 27, Assets: Inventories $ 8,685 $ 7,989 Accounts receivable 18,954 15,652 Accrued expenses 2,435 1,780 Other 214 197 Gross deferred tax assets 30,288 25,618 Liabilities: Depreciation 13,207 13,406 Goodwill and intangible assets 9,524 9,761 Gross deferred tax liabilities 22,731 23,167 Net deferred tax assets $ 7,557 $ 2,451

Capital Stock (Tables)

Capital Stock (Tables)	12 Months Ended
	Dec. 26, 2015
Equity [Abstract]
Summary of Restricted Stock Activity	The following table summarizes our restricted stock activity for the three years ended December 26, 2015: Shares Weighted Balance at December 29, 2012 174,154 $ 18.02 Granted 25,500 $ 45.06 Vested (47,069 ) $ 17.38 Cancelled (43,126 ) $ 18.28 Balance at December 28, 2013 109,459 $ 24.47 Granted 26,347 $ 51.41 Vested (41,619 ) $ 23.44 Cancelled (21,287 ) $ 48.29 Balance at December 27, 2014 72,900 $ 27.82 Granted 44,104 $ 45.68 Vested (38,580 ) $ 25.24 Cancelled (35,182 ) $ 44.84 Balance at December 26, 2015 43,242 $ 34.49
Summary of Stock Option Activity	The following table summarizes our stock option activity for the three years ended December 26, 2015: Shares Option Price Weighted Weighted Aggregate Balance at December 29, 2012 274,000 $ 2.54 – $22.71 $ 8.62 Exercised (96,500 ) $ 2.54 – $22.71 $ 7.21 Cancelled (36,000 ) $ 7.74 – $22.71 $ 16.98 Balance at December 28, 2013 141,500 $ 5.05 – $19.37 $ 7.13 Exercised (66,500 ) $ 5.67 – $19.37 $ 6.97 Balance at December 27, 2014 75,000 $ 5.05 – $19.37 $ 7.28 Exercised (35,000 ) $ 5.05 – $19.37 $ 7.76 Balance at December 26, 2015 40,000 $ 5.67 – $7.74 $ 6.86 2.3 $ 1,688,920 Options exercisable at December 26, 2015 40,000 $ 5.67 – $7.74 $ 6.86 2.3 $ 1,688,920
Summary of Information Concerning Currently Outstanding and Exercisable Options	The following table summarizes information concerning currently outstanding and exercisable options at December 26, 2015: Options Outstanding Options Exercisable Range of Exercise Price Number Weighted Weighted Number Weighted $5.67 4,000 3.0 $ 5.67 4,000 $ 5.67 $6.90 32,000 2.0 $ 6.90 32,000 $ 6.90 $7.74 4,000 4.0 $ 7.74 4,000 $ 7.74 Balance at December 26, 2015 40,000 2.3 $ 6.86 40,000 $ 6.86

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 26, 2015
Earnings Per Share [Abstract]
Schedule of Computation of Basic Earnings per Share and Diluted Earnings per Share	The following table sets forth the computation of basic earnings per share and diluted earnings per share: (in thousands, except per share data) 2015 2014 2013 Numerator: Net income $ 92,329 $ 89,987 $ 81,920 Denominator: Weighted average basic shares outstanding 35,466 36,052 36,347 Effect of compensation awards 72 138 277 Weighted average diluted shares outstanding 35,538 36,190 36,624 Earnings Per Share: Basic $ 2.60 $ 2.50 $ 2.25 Diluted $ 2.60 $ 2.49 $ 2.24

Quarterly Results of Operatio30

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 26, 2015
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations	The following is a summary of the unaudited quarterly Results of Operations for the fiscal years ended December 26, 2015 and December 27, 2014: (in thousands, except per share amounts) First Second Third Fourth 2015 Net sales $ 188,474 $ 198,721 $ 210,928 $ 204,834 Income from operations 33,652 36,895 41,240 34,370 Net income 21,339 23,143 26,060 21,787 Diluted earnings per share 0.60 0.65 0.73 0.62 (in thousands, except per share amounts) First Second Third Fourth 2014 Net sales $ 183,512 $ 196,187 $ 197,796 $ 173,981 Income from operations 36,947 36,700 38,476 28,611 Net income 23,551 23,244 24,536 18,656 Diluted earnings per share 0.64 0.64 0.68 0.52

Summary of Significant Accoun31

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 26, 2015USD ($)ContractCustomer	Dec. 27, 2014USD ($)ContractCustomer	Dec. 28, 2013USD ($)
Summary Of Significant Accounting Policies Textual [Abstract]
Highly liquid short-term investments maturity date	Three months or less
Sale of accounts receivable	$ 519.2	$ 477.9	$ 406.4
Additional receivables outstanding if receivables had not been sold	335.9	298.9
Factoring costs associated with the sales of accounts receivable	7.2	6.2	5.2
Long-term core inventory	14.6	10.2
Accrued customer rebates	15	14.3
Product warranty reserves	0.5	0.1
Research and development costs	$ 16.8	$ 15.8	$ 13.4
Number of largest customers | Customer	5	5
Net accounts receivable from five largest customers	79.00%	81.00%
Percentage of products purchased from foreign suppliers	71.00%
Number of foreign exchange forward contracts outstanding | Contract	0	0
Minimum [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Estimated useful life of Property, Plant and Equipment	3 years
Maximum [Member]
Summary Of Significant Accounting Policies Textual [Abstract]
Estimated useful life of Property, Plant and Equipment	39 years

Summary of Significant Accoun32

Summary of Significant Accounting Policies - Estimated Useful Lives by Major Asset (Detail)	12 Months Ended
	Dec. 26, 2015
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	3 years
Minimum [Member] | Buildings and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	10 years
Minimum [Member] | Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	3 years
Minimum [Member] | Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	3 years
Minimum [Member] | Furniture, Fixtures and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	39 years
Maximum [Member] | Buildings and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	39 years
Maximum [Member] | Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	10 years
Maximum [Member] | Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	10 years
Maximum [Member] | Furniture, Fixtures and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of Property, Plant and Equipment	15 years

New and Recently Adopted Acco33

New and Recently Adopted Accounting Pronouncements - Additional Information (Detail) $ in Millions	Nov. 30, 2015USD ($)
Accounting Policies [Abstract]
Decrease in current deferred tax assets	$ 25.1
Increase in non-current deferred tax assets	2.5
Decrease in non-current deferred tax liabilities	$ 22.6

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	May. 17, 2013
Business Combinations [Abstract]
Business acquisition date	May 17, 2013
Business acquisition purchase price of certain assets and assumed certain liabilities			$ 3.7
Business acquisition of certain assets and assumed certain liabilities in cash			1.9
Business acquisition estimated contingent payments			1.8
Business acquisition of goodwill and other intangible assets			$ 3.6
Reduction in contingent payment liability		$ 1

Inventories - Inventories (Deta

Inventories - Inventories (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Inventory Disclosure [Abstract]
Bulk product	$ 78,533	$ 65,603
Finished product	112,012	105,117
Packaging materials	3,180	2,803
Total	$ 193,725	$ 173,523

Property, Plant and Equipment -

Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Property, Plant and Equipment [Line Items]
Total	$ 179,669	$ 165,125
Less-accumulated depreciation and amortization	(92,623)	(82,855)
Property, plant and equipment, net	87,046	82,270
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total	29,056	29,185
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Total	76,991	66,441
Furniture, Fixtures and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	4,015	3,974
Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total	$ 69,607	$ 65,525

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail)	12 Months Ended
	Dec. 26, 2015USD ($)LetterOfCredit
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 30,000,000
Expiration date of credit facility	2017-06
Interest rate of credit facility	1.07%
Borrowings under credit facility	$ 0
Amount available under line of credit	$ 29,000,000
Number of letters of credit outstanding | LetterOfCredit	2
Letters of Credit [Member]
Debt Instrument [Line Items]
Borrowings under credit facility	$ 1,000,000
Minimum [Member]
Debt Instrument [Line Items]
LIBOR basis points	0.65%
Maximum [Member]
Debt Instrument [Line Items]
LIBOR basis points	2.50%

Operating Lease Commitments a38

Operating Lease Commitments and Rent Expense - Summary of Future Minimum Rental Payments under Leases (Detail) $ in Thousands	Dec. 26, 2015USD ($)
Leases [Abstract]
2,016	$ 3,967
2,017	3,902
2,018	1,973
2,019	72
2,020	0
Thereafter	0
Total	$ 9,914

Operating Lease Commitments a39

Operating Lease Commitments and Rent Expense - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Leases [Abstract]
Rent expense, including payments for short-term equipment and storage rentals	$ 4.5	$ 4.1	$ 3.7

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Related Party Transaction [Line Items]
Total annual rental payments to the partnership under the lease arrangement	$ 1.6	$ 1.5	$ 1.5
Lease expiration date	Dec. 31, 2017
Joint Venture [Member]
Related Party Transaction [Line Items]
Purchases from Suppliers	$ 9.9	$ 9.3	$ 5.6

Income Taxes - Components of In

Income Taxes - Components of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Current:
Federal	$ 55,140	$ 48,293	$ 42,458
State	3,578	2,882	3,105
Current, Total	58,718	51,175	45,563
Deferred:
Federal	(4,874)	(597)	249
State	(232)	(35)	18
Deferred, Total	(5,106)	(632)	267
Total	$ 53,612	$ 50,543	$ 45,830

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Taxes at Statutory Tax Rate to Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal taxes at statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax benefit	1.80%	1.20%	1.60%
Research and development tax credit	(0.20%)	(0.40%)	(0.70%)
Other	0.10%	0.20%
Effective tax rate	36.70%	36.00%	35.90%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Tax Contingency [Line Items]
Net unrecognized tax benefits	$ 1,855	$ 1,163	$ 1,201	$ 1,785
Unrecognized tax benefits which would impact effective tax rate if recognized	1,300
Accrued interest related to uncertain tax positions	$ 200
Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Income tax examination by the Internal Revenue service	2,011
Earliest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination	2,009
Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Income tax examination by the Internal Revenue service	2,012
Latest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination	2,012

Income Taxes - Change in Uncert

Income Taxes - Change in Uncertain Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,163	$ 1,201	$ 1,785
Reductions due to lapses in statutes of limitations		(301)	(30)
Reductions due to tax positions settled	(177)		(271)
Reductions due to reversals of prior year positions	(20)	(38)	(736)
Additions based on tax positions taken during the current period	889	301	453
Balance at end of year	$ 1,855	$ 1,163	$ 1,201

Income Taxes - Reconciliation45

Income Taxes - Reconciliation of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Assets:
Inventories	$ 8,685	$ 7,989
Accounts receivable	18,954	15,652
Accrued expenses	2,435	1,780
Other	214	197
Gross deferred tax assets	30,288	25,618
Liabilities:
Depreciation	13,207	13,406
Goodwill and intangible assets	9,524	9,761
Gross deferred tax liabilities	22,731	23,167
Net deferred tax assets	$ 7,557	$ 2,451

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding shares owned by controlling family	24.00%
Shares authorized of undesignated capital stock for future issuance	50,000,000
Authorized number of common stock shares for grant	2,000,000
Date of plan approval	May 20, 2009
Maximum grant period from date of plan approval	10 years
Shares available for grant under the plan	1,710,844
Compensation cost related to restricted stock	$ 900,000	$ 1,100,000	$ 800,000
Cash received from option exercises under the plan	93,000	463,000	551,000
Total 401(K) expense	$ 2,500,000	$ 2,500,000	$ 1,900,000
Common stock, shares held by 401(K) plan	327,708
Repurchase and cancellation of shares	33,430	61,830	78,580
Common stock repurchased, average price	$ 48.14	$ 50.71	$ 44.39
Common stock repurchased, value	$ 1,600,000	$ 3,100,000	$ 3,500,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to stock options	$ 100,000	$ 100,000	$ 100,000
Share Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchased, average price	$ 47.77	$ 47.20
Common stock repurchased, value	$ 35,700,000	$ 40,400,000
Share repurchase program shares authorized to be repurchased	$ 150,000,000	$ 10,000,000
Shares repurchased under share repurchase program	747,700	855,600	0
Authorized date of repurchase of outstanding common stock		Dec. 12, 2013
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized compensation cost	$ 0	$ 0	$ 0
Unrecognized compensation cost related to non-vested stock options	$ 1,000,000
Unrecognized compensation cost related to nonvested stock options, weighted-average period	2 years 10 months 24 days
Tax benefit generated from compensation cost and credited to additional paid in capital	$ 300,000	500,000	300,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized compensation cost	0	0	0
Unrecognized compensation cost related to non-vested stock options	0
Tax benefit generated from compensation cost and credited to additional paid in capital	$ 100,000	$ 300,000	$ 800,000
Stock options granted	0	0	0
Percentage of forfeiture assumption in calculation of compensation cost	5.40%	5.40%	5.40%
Intrinsic value of stock options exercised	$ 1,400,000

Capital Stock - Summary of Rest

Capital Stock - Summary of Restricted Stock Activity (Detail) - $ / shares	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Beginning Balance, Shares	72,900	109,459	174,154
Granted, Shares	44,104	26,347	25,500
Vested, Shares	(38,580)	(41,619)	(47,069)
Cancelled, Shares	(35,182)	(21,287)	(43,126)
Ending Balance, Shares	43,242	72,900	109,459
Beginning Balance, Weighted Average Price	$ 27.82	$ 24.47	$ 18.02
Granted, Weighted Average Price	45.68	51.41	45.06
Vested, Weighted Average Price	25.24	23.44	17.38
Cancelled, Weighted Average Price	44.84	48.29	18.28
Ending Balance, Weighted Average Price	$ 34.49	$ 27.82	$ 24.47

Capital Stock - Summary of Stoc

Capital Stock - Summary of Stock Option Activity (Detail) - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Shares	75,000	141,500	274,000
Exercised, Shares	(35,000)	(66,500)	(96,500)
Cancelled, Shares			(36,000)
Ending Balance, Shares	40,000	75,000	141,500
Beginning Balance, Weighted Average Price	$ 7.28	$ 7.13	$ 8.62
Options Exercisable, Shares	40,000
Exercised, Weighted Average Price	$ 7.76	6.97	7.21
Cancelled, Weighted Average Price			16.98
Ending Balance, Weighted Average Price	6.86	7.28	7.13
Options Exercisable, Option Price per Share	$ 6.86
Ending Balance, Weighted Average Remaining Terms (years)	2 years 3 months 18 days
Options Exercisable, Weighted Average Remaining Terms (years)	2 years 3 months 18 days
Ending Balance, Aggregate Intrinsic Value	$ 1,688,920
Options Exercisable, Aggregate Intrinsic Value	$ 1,688,920
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Option Price per Share	$ 5.05	5.05	2.54
Option Price per Share, Exercised	5.05	5.67	2.54
Option Price per Share, Cancelled			7.74
Ending Balance, Option Price per Share	5.67	5.05	5.05
Options Exercisable, Option Price per Share	5.67
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Option Price per Share	19.37	19.37	22.71
Option Price per Share, Exercised	19.37	19.37	22.71
Option Price per Share, Cancelled			22.71
Ending Balance, Option Price per Share	7.74	$ 19.37	$ 19.37
Options Exercisable, Option Price per Share	$ 7.74

Capital Stock - Summary of Info

Capital Stock - Summary of Information Concerning Currently Outstanding and Exercisable Options (Detail)	12 Months Ended
	Dec. 26, 2015$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding | shares	40,000
Weighted Average Remaining Contractual Life (Years)	2 years 3 months 18 days
Weighted Average Exercise Price	$ 6.86
Number Exercisable | shares	40,000
Options Exercisable, Weighted Average Exercise Price	$ 6.86
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Option Price per share, Minimum	$ 5.67
Number Outstanding | shares	4,000
Weighted Average Remaining Contractual Life (Years)	3 years
Weighted Average Exercise Price	$ 5.67
Number Exercisable | shares	4,000
Options Exercisable, Weighted Average Exercise Price	$ 5.67
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Option Price per share, Minimum	$ 6.90
Number Outstanding | shares	32,000
Weighted Average Remaining Contractual Life (Years)	2 years
Weighted Average Exercise Price	$ 6.90
Number Exercisable | shares	32,000
Options Exercisable, Weighted Average Exercise Price	$ 6.90
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Option Price per share, Minimum	$ 7.74
Number Outstanding | shares	4,000
Weighted Average Remaining Contractual Life (Years)	4 years
Weighted Average Exercise Price	$ 7.74
Number Exercisable | shares	4,000
Options Exercisable, Weighted Average Exercise Price	$ 7.74

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Earnings Per Share [Abstract]
Stock-based awards considered as anti-dilutive	7,500	5,000	0

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Computation of Basic Earnings per Share and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Numerator:
Net income	$ 21,787	$ 26,060	$ 23,143	$ 21,339	$ 18,656	$ 24,536	$ 23,244	$ 23,551	$ 92,329	$ 89,987	$ 81,920
Denominator:
Weighted average basic shares outstanding									35,466	36,052	36,347
Effect of compensation awards									72	138	277
Weighted average diluted shares outstanding									35,538	36,190	36,624
Earnings Per Share:
Basic									$ 2.60	$ 2.50	$ 2.25
Diluted	$ 0.62	$ 0.73	$ 0.65	$ 0.60	$ 0.52	$ 0.68	$ 0.64	$ 0.64	$ 2.60	$ 2.49	$ 2.24

Business Segments - Additional

Business Segments - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 26, 2015USD ($)Customer	Dec. 27, 2014USD ($)	Dec. 28, 2013USD ($)
Product Information [Line Items]
Number of customers exceeding 10% of net sales | Customer	4
Total percentage of sales to customers exceeding 10% of sales	60.00%	60.00%	57.00%
Net sales outside of the U.S. | $	$ 49.8	$ 39.1	$ 33.2
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Product Information [Line Items]
Percentage of net sales	10.00%	10.00%	10.00%

Quarterly Results of Operatio53

Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 204,834	$ 210,928	$ 198,721	$ 188,474	$ 173,981	$ 197,796	$ 196,187	$ 183,512	$ 802,957	$ 751,476	$ 664,466
Income from operations	34,370	41,240	36,895	33,652	28,611	38,476	36,700	36,947	146,157	140,734	127,939
Net income	$ 21,787	$ 26,060	$ 23,143	$ 21,339	$ 18,656	$ 24,536	$ 23,244	$ 23,551	$ 92,329	$ 89,987	$ 81,920
Diluted earnings per share	$ 0.62	$ 0.73	$ 0.65	$ 0.60	$ 0.52	$ 0.68	$ 0.64	$ 0.64	$ 2.60	$ 2.49	$ 2.24

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts
Balance, beginning of period	$ 1,508	$ 1,281	$ 1,120
Provision	3,260	308	194
Charge-offs / Credits issued	(265)	(81)	(33)
Balance, end of period	4,503	1,508	1,281
Allowance for Customer Credits [Member]
Valuation and Qualifying Accounts
Balance, beginning of period	77,671	64,598	55,392
Provision	206,560	182,219	141,559
Charge-offs / Credits issued	(201,748)	(169,146)	(132,353)
Balance, end of period	$ 82,483	$ 77,671	$ 64,598